code: def test_empty_string_axis_name():
      np.random.seed(42)
      check_one_hot_operator(
          random_3d_tensors_batch,
          axis=-1,
          initial_layout="ABC",
          axis_name="",
      )
  
imports: from functools import partial
  from nvidia.dali.pipeline import Pipeline
  import nvidia.dali.ops
  import nvidia.dali.types
  from test_utils import check_batch
  from nose_utils import raises
  import numpy
label_desc: Use image node_id 17 for calling a global function with example usage: test_empty_string_axis_name() without return types